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问答题

Pollution has become a serious problem in almost all the big cities of the world. City people are becoming more and more worried about how they can【B1】______ pollution. They are also concerned about whether the government is doing enough to【B2】______ the environment. However, people in Ireland don’t have these worries. They are sure that they have found the【B3】______ the problem. They use windmills. These windmills can create power without【B4】______ pollution. This method is so successful that other countries are【B5】______ doing the same. Why not What works for Ireland can work for any other country

【B4】
【参考答案】

正确答案：creating

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